//
//  MainTabBar.swift
//  sinaweibo
//
//  Created by icefs2 on 15/11/8.
//  Copyright © 2015年 icefs2. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {

    override init(frame: CGRect) {
        super.init(frame: frame)
        updateUI()
    }
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        updateUI()
        
    }
    private func updateUI() {
        addSubview(composeBtn)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        let w = self.bounds.width / 5
        
        let h = self.bounds.height
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        var index: CGFloat = 0
        for subview in subviews {
            if subview.isKindOfClass(NSClassFromString("UITabBarButton")!) {
                subview.frame = CGRectOffset(rect, index * w, 0)
                index += index == 1 ? 2 : 1
            
            }
        }
        composeBtn.frame = CGRectOffset(rect, 2 * w, 0)
        bringSubviewToFront(composeBtn)
        
    }
    
    lazy var composeBtn: UIButton = {
        let btn = UIButton()
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
        btn.sizeToFit()
        return btn
    }()

}
